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Yeah
I would have very much thought that would have been the
case as well Clark............ however...........
Came across a vineyard that had put in a man made plastic
lined lake to combat frost rather than bring in helicopters.
The cost of doing so must have been enormous & would imagine
the pumping station & filters alone, would not be far short
of $1mill.
Hard to estimate the area of the lake because of the shape
which is something like a bulging comma but would guess at
6 or 7 acres & is 3 1/2 mtrs deep towards the center. The plastic
lining material is really thick, would think 3 mm or more & about
6 mtr. wide strips lapped then welded the entire length. The
plastic overuns the water level up over the steeply sloping bank
by a mtr. or two making it virtually leakproof.
Not sure when but presume it would be a couple of years or more
ago 650 rainbows were introduced, with the intention of providing
a fishing venue for kids, school groups & the disabled. The fish were
initially pellet fed & were doing well but ceased being fed when it was
decided it was an unsafe habitat for kids etc. The reason being that
the sloping plastic banks proved to be dangerously slippery & once
in the water near impossible to clamber out. This fact is attested to by
the number of possum & cat (presumably wild) bodies floating semi
submerged.
Anyway when they ceased feeding the fish it was not known what
to expect, but was largely thought that they would quickly cease to
exist, but not so it appears, they appear to be thriving. I was intrigued
to observe the occasional hatch & fish sparodically feeding off the top.
I was fortunate by way of referall to be given permission to fish it &
with the local rivers still in flood with little relief in sight, was desperate
enough to even try fishing a man made lake. Did not catch anything but did
not stay that long either, opting to fish the nearby river when it appeared
to be almost marginally clearing before rain was about to start again.
I am given to understand, like most fishing the trout in the lake are either
"on or off" but when they are "on" can be very obliging with fish up to
3 or 4lbs. Due to the potential danger & the liability of OSH regs
understandably obtaining the ok to fish there is not freely given but with
the rivers still in flood, rain persisting & snow on the hills will probably take
up the extended invitation to return again for a fish once the rain stops.
I am still surprised the that the fish are not only surviving, but well
conditioned & continuing to grow. The water is pumped from the river &
filtered before being pumped sprayed onto the vineyard to combat frost
when required. From there it probably soaks back into the river so I guess
the whole process is considered to be relatively environmentally friendly.
Was told someone put a 2 lb. brown caught in the river into the lake & it
was caught recently weighing 6 lbs.
Cheers
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